139939466 has 8 divisors (see below), whose sum is σ = 210003300. Its totient is φ = 69938368.

The previous prime is 139939441. The next prime is 139939489. The reversal of 139939466 is 664939931.

It can be written as a sum of positive squares in 2 ways, for example, as 86955625 + 52983841 = 9325^2 + 7279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9641 + ... + 19308.

Almost surely, 2^139939466 is an apocalyptic number.

139939466 is a deficient number, since it is larger than the sum of its proper divisors (70063834).

139939466 is a wasteful number, since it uses less digits than its factorization.

139939466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31368.

The product of its digits is 944784, while the sum is 50.

The square root of 139939466 is about 11829.6012612429. The cubic root of 139939466 is about 519.1745607204.

The spelling of 139939466 in words is "one hundred thirty-nine million, nine hundred thirty-nine thousand, four hundred sixty-six".